WO2020199250A1 - 像素驱动电路以及像素驱动电路的补偿方法 - Google Patents

像素驱动电路以及像素驱动电路的补偿方法 Download PDF

Info

Publication number
WO2020199250A1
WO2020199250A1 PCT/CN2019/082983 CN2019082983W WO2020199250A1 WO 2020199250 A1 WO2020199250 A1 WO 2020199250A1 CN 2019082983 W CN2019082983 W CN 2019082983W WO 2020199250 A1 WO2020199250 A1 WO 2020199250A1
Authority
WO
WIPO (PCT)
Prior art keywords
transistor
compensation
signal
module
electrically connected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/082983
Other languages
English (en)
French (fr)
Inventor
李新吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Publication of WO2020199250A1 publication Critical patent/WO2020199250A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix

Definitions

  • This application relates to the field of display technology, specifically a pixel drive circuit and a compensation method of the pixel drive circuit.
  • the transistors in the pixel driving circuit are low-temperature polysilicon thin film transistors or oxide thin film transistors.
  • low-temperature polysilicon thin film transistors and oxide thin film transistors have higher mobility and more stable characteristics, and are more suitable for active matrix organic light-emitting diodes (Active-matrix Organic light-emitting diode, AMOLED) is displaying.
  • AMOLED Active-matrix Organic light-emitting diode
  • low-temperature polysilicon thin film transistors fabricated on large-area glass substrates often have non-uniformities in electrical parameters such as threshold voltage and mobility. This non-uniformity will be transformed into organic light-emitting diodes (Organic The difference in driving current and brightness of Light Emitting Diode (OLED) devices are perceived by the human eye, that is, color unevenness.
  • OLED Light Emitting Diode
  • oxide thin film transistors have better process uniformity, they are similar to amorphous silicon thin film transistors. Under long-term pressure and high temperature, their threshold voltage will drift, resulting in different display images. Different threshold drifts will cause differences in display brightness. This difference is related to the previously displayed image, so it often appears as an afterimage phenomenon.
  • the main technical problem to be solved by this application is how to compensate the threshold voltage change of the driving transistor, improve the light emission uniformity of the light emitting device, and thereby improve the image quality.
  • the present application provides a pixel driving circuit, including: a compensation module, a light-emitting module, and a detection module; the compensation module and the detection module are both connected to the light-emitting module, and the compensation module is connected to the detection module. Module connection;
  • the compensation module is connected to a scan signal and a data signal of the current level, and the compensation module is used to transmit the data signal to the light emitting module under the control of the scan signal of the current level;
  • the detection module accesses a control signal, and the detection module is used to detect the actual current of the light-emitting module and compare the actual current with a preset current to generate the compensation voltage of the light-emitting module;
  • the compensation module is also used to compensate the data signal according to the compensation voltage under the control of the scan signal of the current level
  • the compensation module includes a storage capacitor and a first transistor
  • the first end of the storage capacitor is electrically connected to the first node, and the second end of the storage capacitor is electrically connected to the upper level scan signal;
  • the gate of the first transistor is electrically connected to the scan signal of the current level, the source of the first transistor is electrically connected to the data signal, and the drain of the first transistor is electrically connected to the First node
  • the storage capacitor includes a first electrode plate and a second electrode plate arranged oppositely, the first electrode plate is electrically connected to the first node, the second electrode plate is a scan line, and the scan line is used for Input the upper level scanning signal;
  • the light-emitting module includes a second transistor and a light-emitting device
  • the gate of the second transistor is electrically connected to the first node, the source of the second transistor is electrically connected to a power signal, and the drain of the second transistor is electrically connected to the second node;
  • the cathode terminal of the light emitting device is electrically connected to the second node, and the anode terminal of the light emitting device is electrically connected to the ground terminal.
  • the detection module includes a third transistor
  • the gate of the third transistor is electrically connected to the control signal, and the source of the third transistor is electrically connected to a current detection module.
  • the current detection module is used to detect the actual current of the light emitting module, and The actual current is compared with a preset current to generate a compensation voltage of the light-emitting module, and the drain of the third transistor is electrically connected to the second node.
  • the compensation module In the pixel driving circuit provided by the present application, the compensation module generates a compensation voltage of the second transistor according to the actual current flowing through the second transistor, and then generates a compensation signal according to the compensation voltage of the second transistor, and The compensation signal is transmitted to the first transistor.
  • the driving timing of the pixel driving circuit includes:
  • the scan signal of the current level is at a low level
  • the control signal is at a low level
  • the scan signal at the previous level is at a high level
  • the second transistor is turned on, and the power signal Transmit to the light emitting device through the first transistor
  • the scan signal of the current level is at a low level
  • the control signal is at a high level
  • the signal at the previous level is at a high level
  • the second transistor is turned on.
  • the third transistor is turned on, the first power signal is transmitted to the light emitting device through the second transistor, the detection module detects the actual current output by the drain of the first transistor, and calculates the actual The difference between the current and the preset current to calculate the compensation voltage of the second transistor;
  • the current level scan signal is at a high level
  • the control signal is at a high level
  • the previous level scan signal is at a low level
  • the first transistor is turned on
  • the second transistor is turned on
  • the data signal is transmitted to the gate of the second transistor through the first transistor
  • the compensation module compensates the data signal according to the compensation voltage
  • the power signal It is transmitted to the light emitting device through the first transistor.
  • the first transistor, the second transistor, and the third transistor are all N-type transistors.
  • control signal is provided by an external timing device.
  • the present application provides a pixel driving circuit, including: a compensation module, a light emitting module, and a detection module; the compensation module and the detection module are both connected to the light emitting module, and the compensation module is connected to the detection module. Module connection;
  • the compensation module is connected to a scan signal and a data signal of the current level, and the compensation module is used to transmit the data signal to the light emitting module under the control of the scan signal of the current level;
  • the detection module accesses a control signal, and the detection module is used to detect the actual current of the light-emitting module and compare the actual current with a preset current to generate the compensation voltage of the light-emitting module;
  • the compensation module is also used to compensate the data signal according to the compensation voltage under the control of the scan signal of the current level.
  • the compensation module includes a storage capacitor and a first transistor
  • the first end of the storage capacitor is electrically connected to the first node, and the second end of the storage capacitor is electrically connected to the upper level scan signal;
  • the gate of the first transistor is electrically connected to the scan signal of the current level, the source of the first transistor is electrically connected to the data signal, and the drain of the first transistor is electrically connected to the The first node.
  • the storage capacitor includes a first electrode plate and a second electrode plate that are disposed oppositely, the first electrode plate is electrically connected to the first node, and the second electrode plate It is a scan line, and the scan line is used to input the previous scan signal.
  • the light-emitting module includes a second transistor and a light-emitting device
  • the gate of the second transistor is electrically connected to the first node, the source of the second transistor is electrically connected to a power signal, and the drain of the second transistor is electrically connected to the second node;
  • the cathode terminal of the light emitting device is electrically connected to the second node, and the anode terminal of the light emitting device is electrically connected to the ground terminal.
  • the detection module includes a third transistor
  • the gate of the third transistor is electrically connected to the control signal, and the source of the third transistor is electrically connected to a current detection module.
  • the current detection module is used to detect the actual current of the light emitting module, and The actual current is compared with a preset current to generate a compensation voltage of the light-emitting module, and the drain of the third transistor is electrically connected to the second node.
  • the compensation module In the pixel driving circuit provided by the present application, the compensation module generates a compensation voltage of the second transistor according to the actual current flowing through the second transistor, and then generates a compensation signal according to the compensation voltage of the second transistor, and The compensation signal is transmitted to the first transistor.
  • the driving timing of the pixel driving circuit includes:
  • the scan signal of the current level is at a low level
  • the control signal is at a low level
  • the scan signal at the previous level is at a high level
  • the second transistor is turned on, and the power signal Transmit to the light emitting device through the first transistor
  • the scan signal of the current level is at a low level
  • the control signal is at a high level
  • the signal at the previous level is at a high level
  • the second transistor is turned on.
  • the third transistor is turned on, the first power signal is transmitted to the light emitting device through the second transistor, the detection module detects the actual current output by the drain of the first transistor, and calculates the actual The difference between the current and the preset current to calculate the compensation voltage of the second transistor;
  • the current level scan signal is at a high level
  • the control signal is at a high level
  • the previous level scan signal is at a low level
  • the first transistor is turned on
  • the second transistor is turned on
  • the data signal is transmitted to the gate of the second transistor through the first transistor
  • the compensation module compensates the data signal according to the compensation voltage
  • the power signal It is transmitted to the light emitting device through the first transistor.
  • the first transistor, the second transistor, and the third transistor are all N-type transistors.
  • control signal is provided by an external timing device.
  • the present application provides a compensation method for a pixel driving circuit, including:
  • the pixel driving circuit is compensated.
  • the beneficial effect of the present application is: by detecting the actual current of the driving transistor in each pixel, and determining the threshold voltage of the driving transistor in each pixel according to the actual current, thereby effectively compensating the driving transistor in each pixel, In order to achieve the purpose of improving the uniformity of light emission of the light-emitting device, thereby improving the image quality.
  • FIG. 1 is a schematic structural diagram of a pixel driving circuit provided by an embodiment of the application
  • FIG. 2 is a schematic circuit diagram of a pixel drive circuit provided by an embodiment of the application.
  • 3 is a timing diagram of driving signals of the pixel driving circuit provided by this application.
  • FIG. 4 is a schematic flowchart of the compensation method of the pixel driving circuit provided by this application.
  • the transistors used in all the embodiments of this application can be thin film transistors or field effect transistors or other devices with the same characteristics. Since the source and drain of the transistor used here are symmetrical, the source and drain can be interchanged of. In the embodiments of the present application, in order to distinguish the two poles of the transistor except the gate, one of the poles is called the source and the other is called the drain. According to the form in the figure, it is stipulated that the middle end of the switching transistor is the gate, the signal input end is the source, and the output end is the drain.
  • the transistors used in the embodiments of the present application may include P-type transistors and/or N-type transistors. The P-type transistor is turned on when the gate is at a low level, and turned off when the gate is at a high level. The gate is turned on when the gate is high, and it is turned off when the gate is low.
  • FIG. 1 is a schematic structural diagram of a pixel driving circuit provided by an embodiment of the application.
  • the pixel driving circuit provided by the embodiment of the present application includes: a compensation module 101, a light emitting module 102 and a detection module 103. Both the compensation module 101 and the detection module 103 are connected to the light emitting module 102, and the compensation module 101 is connected to the detection module 103.
  • the compensation module 101 is connected to the scan signal and the data signal Data of the current level, and the compensation module 101 is used to transmit the data signal Data to the light emitting module 102 under the control of the scan signal of the current level.
  • the detection module 103 accesses the control signal RD, and the detection module 103 is used to detect the actual current Ir of the light-emitting module 102 and compare the actual current Ir with the preset current I to generate the compensation voltage V of the light-emitting module 102.
  • the compensation module 101 is also used to compensate the data signal Data according to the compensation voltage V under the control of the scan signal of the current level.
  • FIG. 2 is a schematic circuit diagram of a pixel driving circuit provided by an embodiment of the application.
  • the compensation module 101 includes a storage capacitor C1 and a first transistor T1.
  • the first end of the storage capacitor C1 is electrically connected to the first node a, and the second end of the storage capacitor is electrically connected to the previous scan signal.
  • the gate of the first transistor T1 is electrically connected to the scan signal of the current level, the source of the first transistor T1 is electrically connected to the data signal Data, and the drain of the first transistor T1 is electrically connected to the first node a.
  • the light emitting module 102 includes a second transistor T2 and a light emitting device D.
  • the gate of the second transistor T2 is electrically connected to the first node a
  • the source of the second transistor T2 is electrically connected to the power signal ELVDD
  • the drain of the second transistor T2 is electrically connected to the second node b.
  • the cathode terminal of the light emitting device D is electrically connected to the second node b
  • the anode terminal of the light emitting device D is electrically connected to the ground terminal.
  • the detection module 103 includes a third transistor T3.
  • the third transistor T3 is electrically connected to the control signal RD, the source of the third transistor T3 is electrically connected to the current detection module 103a, and the source of the third transistor is electrically connected to the second node b.
  • the current detection module 103a is used to detect the actual current Ir of the light-emitting module 102 and compare the actual current Ir with the preset current I to generate the compensation voltage V of the light-emitting module 102.
  • the first transistor T1, the second transistor T2, and the third transistor T3 are all N-type transistors.
  • the transistors in the pixel driving circuit provided by the embodiments of the present application are the same type of transistors, so as to avoid the influence of the difference between different types of transistors on the pixel driving circuit.
  • control signal RD is provided by an external timing device.
  • the storage capacitor C1 includes a first electrode plate 21 and a second electrode plate 22 arranged oppositely, the first electrode plate 21 is electrically connected to the first node a, and the second electrode plate 22 is Scan line, the scan line is used to input the previous scan signal.
  • scan lines as the second plate 22 of the storage capacitor C1 does not need to add additional scan lines, and the aperture ratio of the pixel driving circuit can also be increased, thereby increasing the light-emitting area of the aperture.
  • FIG. 3 is a timing diagram of driving signals of the pixel driving circuit provided by this application.
  • the driving sequence of the pixel driving circuit includes an initialization phase t1, a threshold voltage detection phase t2, and a threshold voltage compensation phase t3.
  • the scan signal of this level is low
  • the control signal RD is low
  • the scan signal of the previous level is high
  • the second transistor T2 is turned on
  • the power signal ELVDD is transmitted to the light emitting device D through the first transistor T1.
  • the voltage of the second transistor T2 is Vref.
  • the scan signal of this stage is at a low level
  • the control signal RD is at a high level
  • the scan signal at the previous level is at a high level
  • the second transistor T2 is turned on
  • the third transistor T3 is turned on
  • the power signal ELVDD The second transistor T2 is transmitted to the light emitting device D.
  • the detection module 103 detects the actual current Ir output by the drain of the first transistor T1, and calculates the difference between the actual current Ir and the preset current I to calculate the The compensation voltage V of the second transistor T2.
  • the scan signal of this stage is at high potential
  • the control signal RD is at high potential
  • the scan signal of the previous stage is at low potential
  • the first transistor T1 is turned on
  • the second transistor T2 is turned on
  • the data signal Data The first transistor T1 is transmitted to the gate of the second transistor T2, the compensation module 101 compensates the data signal Data according to the compensation voltage V, and the power signal ELVDD is transmitted to the light emitting device D through the first transistor T1.
  • the compensation module 101 generates the compensation voltage V of the second transistor according to the actual current Ir flowing through the second transistor T2, generates a compensation signal according to the threshold voltage V of the second transistor T2, and transmits the compensation signal to the second transistor T2.
  • a transistor T1 A transistor T1.
  • the compensation module 101 calculates the difference between the actual current Ir flowing through the second transistor T2 and the preset current I.
  • the preset current I is 2 mA
  • the actual current is 1.5 mA
  • the difference between the actual current Ir and the preset current I is 0.5 mA.
  • the detection module 103 is driven by the control signal RD to apply a compensation current Ib of 0.5 mA to the second transistor T2, so that the actual current Ir stabilizes at 2 mA.
  • the compensation module 101 generates the compensation voltage V of the second transistor T2 according to the compensation current Ib.
  • a compensation signal is generated according to the compensation voltage V of the second transistor T2, and the compensation signal is transmitted to the first transistor T1 to complete the compensation of the pixel driving circuit.
  • FIG. 4 is a schematic flowchart of the compensation method of the pixel driving circuit provided by this application.
  • This application also provides a compensation method for a pixel driving circuit, including:
  • the actual current Ir of the second transistor T2 of the pixel driving circuit is detected. Then, the difference between the actual current Ir flowing through the second transistor T2 and the preset current I is calculated, and the compensation current Is is provided to the second transistor T2 according to the difference between the actual current Ir and the preset current I, to Make the current value of the actual current Ir coincide with the current value of the preset current I. Then, the compensation voltage V of the second transistor T2 is generated according to the compensation current Is, and the compensation signal is generated according to the compensation voltage V. Finally, the pixel driving circuit is compensated based on the compensation signal. For the specific structure of the pixel driving circuit, please refer to the previous embodiments, which will not be repeated here.
  • the pixel drive circuit and the compensation method of the pixel drive circuit provided in the present application adopt the 3T1C structure pixel drive circuit to detect the actual current of the drive transistor in each pixel, and determine the threshold value of the drive transistor in each pixel according to the actual current The voltage is then effectively compensated for the driving transistor in each pixel to achieve the purpose of improving the uniformity of light emission of the light-emitting device, thereby improving the image quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种像素驱动电路以及像素驱动电路的补偿方法，采用3T1C结构像素驱动电路，通过检测每一像素中的驱动晶体管的实际电流(Ir)，并根据实际电流(Ir)确定每一像素中的驱动晶体管的阈值电压，进而对每一像素中的驱动晶体管进行有效补偿，以提高发光器件(D)的发光均匀性，进而提升画质。

Description

像素驱动电路以及像素驱动电路的补偿方法 技术领域
本申请涉及显示技术领域，具体一种像素驱动电路以及像素驱动电路的补偿方法。
 背景技术
现有技术中，像素驱动电路中的晶体管大多采用低温多晶硅薄膜晶体管或氧化物薄膜晶体管。与一般的非晶硅薄膜晶体管相比，低温多晶硅薄膜晶体管和氧化物薄膜晶体管具有更高的迁移率和更稳定的特性，更适合应用于有源矩阵有机发光二极管（Active-matrix organic light-emitting diode，AMOLED）显示中。
但是由于晶化工艺的局限性，在大面积玻璃基板上制作的低温多晶硅薄膜晶体管，常常在诸如阈值电压、迁移率等电学参数上具有非均匀性。这种非均匀性会转化为有机发光二极管（Organic Light Emitting Diode，OLED）器件的驱动电流差异和亮度差异，并被人眼所感知，即色不均现象。而氧化物薄膜晶体管虽然工艺的均匀性较好，但是与非晶硅薄膜晶体管类似，在长时间加压和高温下，其阈值电压会出现漂移，导致显示画面不同，由于面板各部分薄膜晶体管的阈值漂移量不同，会造成显示亮度差异。而这种差异与之前显示的图像有关，因此常呈现为残影现象。
 技术问题
本申请主要解决的技术问题，如何能够补偿驱动晶体管的阈值电压变化，提高发光器件的发光均匀性，进而提升画质。
 技术解决方案
第一方面，本申请提供了一种像素驱动电路，包括：补偿模块、发光模块以及检测模块；所述补偿模块以及所述检测模块均与所述发光模块连接，所述补偿模块与所述检测模块连接；
所述补偿模块接入本级扫描信号以及数据信号，所述补偿模块用于在所述本级扫描信号的控制下将所述数据信号传输至所述发光模块；
所述检测模块接入控制信号，所述检测模块用于检测所述发光模块的实际电流，并将所述实际电流与预设电流比较，以生成所述发光模块的补偿电压；
所述补偿模块还用于在所述本级扫描信号的控制下，根据所述补偿电压对所述数据信号进行补偿；
其中，所述补偿模块包括存储电容以及第一晶体管；
所述存储电容的第一端电性连接于第一节点，所述存储电容的第二端电性连接于上一级扫描信号；
所述第一晶体管的栅极电性连接于所述本级扫描信号，所述第一晶体管的源极电性连接于所述数据信号，所述第一晶体管的漏极电性连接于所述第一节点；
所述存储电容包括相对设置的第一极板和第二极板，所述第一极板与所述第一节点电性连接，所述第二极板为扫描线，所述扫描线用于输入所述上一级扫描信号；
在本申请提供的像素驱动电路中，所述发光模块包括第二晶体管以及发光器件；
所述第二晶体管的栅极电性连接于所述第一节点，所述第二晶体管的源极电性连接于电源信号，所述第二晶体管的漏极电性连接于第二节点；
所述发光器件阴极端电性连接于所述第二节点，所述发光器件的阳极端电性连接于接地端。
在本申请提供的像素驱动电路中，所述检测模块包括第三晶体管；
所述第三晶体管的栅极电性连接于所述控制信号，所述第三晶体管的源极电性连接于电流检测模块，所述电流检测模块用于检测所述发光模块的实际电流，并将所述实际电流与预设电流比较，以生成所述发光模块的补偿电压，所述第三晶体管的漏极电性连接于第二节点。
在本申请提供的像素驱动电路中，所述补偿模块根据流经所述第二晶体管的实际电流生成所述第二晶体管的补偿电压，再根据所述第二晶体管的补偿电压生成补偿信号，并将所述补偿信号传输至所述第一晶体管。
在本申请提供的像素驱动电路中，所述像素驱动电路的驱动时序包括：
初始化阶段，在所述初始化阶段，所述本级扫描信号为低电位，所述控制信号为低电位，所述上一级扫描信号为高电位，所述第二晶体管导通，所述电源信号通过所述第一晶体管传输至所述发光器件；
阈值电压检测阶段，在所述阈值电压检测阶段，所述本级扫描信号为低电位，所述控制信号为高电位，所述上一级信号为高电位，所述第二晶体管导通，所述第三晶体管导通，所述第一电源信号通过所述第二晶体管传输至所述发光器件，所述检测模块检测到所述第一晶体管的漏极输出的实际电流，并计算所述实际电流与预设电流之间的差值，以计算出所述第二晶体管的补偿电压；
阈值电压补偿阶段，在所述阈值电压补偿阶段，所述本级扫描信号为高电位，所述控制信号为高电位，所述上一级扫描信号为低电位，所述第一晶体管导通，所述第二晶体管导通，所述数据信号通过所述第一晶体管传输至所述第二晶体管的栅极，所述补偿模块根据所述补偿电压对所述数据信号进行补偿，所述电源信号通过所述第一晶体管传输至所述发光器件。
在本申请提供的像素驱动电路中，所述第一晶体管、所述第二晶体管以及所述第三晶体管均为N型晶体管。
在本申请提供的像素驱动电路中，所述控制信号由外部时序器提供。
第二方面，本申请提供了一种像素驱动电路，包括：补偿模块、发光模块以及检测模块；所述补偿模块以及所述检测模块均与所述发光模块连接，所述补偿模块与所述检测模块连接；
所述补偿模块接入本级扫描信号以及数据信号，所述补偿模块用于在所述本级扫描信号的控制下将所述数据信号传输至所述发光模块；
所述检测模块接入控制信号，所述检测模块用于检测所述发光模块的实际电流，并将所述实际电流与预设电流比较，以生成所述发光模块的补偿电压；
所述补偿模块还用于在所述本级扫描信号的控制下，根据所述补偿电压对所述数据信号进行补偿。
在本申请提供的像素驱动电路中，所述补偿模块包括存储电容以及第一晶体管；
所述存储电容的第一端电性连接于第一节点，所述存储电容的第二端电性连接于上一级扫描信号；
所述第一晶体管的栅极电性连接于所述本级扫描信号，所述第一晶体管的源极电性连接于所述数据信号，所述第一晶体管的漏极电性连接于所述第一节点。
在本申请提供的像素驱动电路中，所述存储电容包括相对设置的第一极板和第二极板，所述第一极板与所述第一节点电性连接，所述第二极板为扫描线，所述扫描线用于输入所述上一级扫描信号。
在本申请提供的像素驱动电路中，所述发光模块包括第二晶体管以及发光器件；
所述第二晶体管的栅极电性连接于所述第一节点，所述第二晶体管的源极电性连接于电源信号，所述第二晶体管的漏极电性连接于第二节点；
所述发光器件阴极端电性连接于所述第二节点，所述发光器件的阳极端电性连接于接地端。
在本申请提供的像素驱动电路中，所述检测模块包括第三晶体管；
所述第三晶体管的栅极电性连接于所述控制信号，所述第三晶体管的源极电性连接于电流检测模块，所述电流检测模块用于检测所述发光模块的实际电流，并将所述实际电流与预设电流比较，以生成所述发光模块的补偿电压，所述第三晶体管的漏极电性连接于第二节点。
在本申请提供的像素驱动电路中，所述补偿模块根据流经所述第二晶体管的实际电流生成所述第二晶体管的补偿电压，再根据所述第二晶体管的补偿电压生成补偿信号，并将所述补偿信号传输至所述第一晶体管。
在本申请提供的像素驱动电路中，所述像素驱动电路的驱动时序包括：
初始化阶段，在所述初始化阶段，所述本级扫描信号为低电位，所述控制信号为低电位，所述上一级扫描信号为高电位，所述第二晶体管导通，所述电源信号通过所述第一晶体管传输至所述发光器件；
阈值电压检测阶段，在所述阈值电压检测阶段，所述本级扫描信号为低电位，所述控制信号为高电位，所述上一级信号为高电位，所述第二晶体管导通，所述第三晶体管导通，所述第一电源信号通过所述第二晶体管传输至所述发光器件，所述检测模块检测到所述第一晶体管的漏极输出的实际电流，并计算所述实际电流与预设电流之间的差值，以计算出所述第二晶体管的补偿电压；
阈值电压补偿阶段，在所述阈值电压补偿阶段，所述本级扫描信号为高电位，所述控制信号为高电位，所述上一级扫描信号为低电位，所述第一晶体管导通，所述第二晶体管导通，所述数据信号通过所述第一晶体管传输至所述第二晶体管的栅极，所述补偿模块根据所述补偿电压对所述数据信号进行补偿，所述电源信号通过所述第一晶体管传输至所述发光器件。
在本申请提供的像素驱动电路中，所述第一晶体管、所述第二晶体管以及所述第三晶体管均为N型晶体管。
在本申请提供的像素驱动电路中，所述控制信号由外部时序器提供。
第三方面，本申请提供一种像素驱动电路的补偿方法，包括：
检测所述像素驱动电路的第二晶体管的实际电流；
计算所述实际电流与预设电流之间的差值，并根据所述差值生成补偿信号；
基于所述补偿信号，对所述像素驱动电路进行补偿。
 有益效果
本申请的有益效果是：通过检测每一像素中的驱动晶体管的实际电流，并根据该实际电流确定每一像素中的驱动晶体管的阈值电压，进而对每一像素中的驱动晶体管进行有效补偿，以到达提高发光器件的发光均匀性的目的，进而提升画质。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的像素驱动电路的结构示意图；
图2为本申请实施例提供的像素驱动电路的电路示意图；
图3为本申请提供的像素驱动电路的驱动信号的时序图；
图4为本申请提供的像素驱动电路的补偿方法的流程示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请所有实施例中采用的晶体管可以为薄膜晶体管或场效应管或其他特性相同的器件，由于这里采用的晶体管的源极、漏极是对称的，所以其源极、漏极是可以互换的。在本申请实施例中，为区分晶体管除栅极之外的两极，将其中一极称为源极，另一极称为漏极。按附图中的形态规定开关晶体管的中间端为栅极、信号输入端为源极、输出端为漏极。此外本申请实施例所采用的晶体管可以包括P 型晶体管和/或N 型晶体管两种，其中，P 型晶体管在栅极为低电平时导通，在栅极为高电平时截止，N 型晶体管为在栅极为高电平时导通，在栅极为低电平时截止。
请参阅图1，图1为本申请实施例提供的像素驱动电路的结构示意图。如图1所示，本申请实施例提供的像素驱动电路，包括：补偿模块101、发光模块102以及检测模块103。补偿模块101以及检测模块103均与发光模块102连接，补偿模块101与检测模块103连接。
其中，补偿模块101接入本级扫描信号以及数据信号Data，补偿模块101用于在本级扫描信号的控制下将数据信号Data传输至发光模块102。检测模块103接入控制信号RD，检测模块103用于检测发光模块102的实际电流Ir，并将实际电流Ir与预设电流I比较，以生成发光模块102的补偿电压V。此外，补偿模块101还用于在本级扫描信的控制下，根据补偿电压V对数据信号Data进行补偿。
具体的，请参阅图2，图2为本申请实施例提供的像素驱动电路的电路示意图。
补偿模块101包括存储电容C1以及第一晶体管T1。存储电容C1的第一端电性连接于第一节点a，存储电容的第二端电性连接于上一级扫描信号。第一晶体管T1的栅极电性连接于本级扫描信号，第一晶体管T1的源极电性连接于数据信号Data，第一晶体管T1的漏极电性连接于第一节点a。
发光模块102包括第二晶体管T2以及发光器件D。第二晶体管T2的栅极电性连接于第一节点a，第二晶体管T2的源极电性连接于电源信号ELVDD，第二晶体管T2的漏极电性连接第二节点b。发光器件D的阴极端电性连接于第二节点b，发光器件D的阳极端电性连接于接地端。
检测模块103包括第三晶体管T3。该第三晶体管T3的电性连接于控制信号RD，第三晶体管T3的源极电性连接于电流检测模块103a，，第三晶体管的源极电性连接于第二节点b。需要说明的是，电流检测模块103a用于检测发光模块102的实际电流Ir，并将实际电流Ir与预设电流I比较，以生成发光模块102的补偿电压V。
在一些实施方式中，第一晶体管T1、第二晶体管T2以及第三晶体管T3均为N型晶体管。本申请实施例提供的像素驱动电路中的晶体管为同一种类型的晶体管，从而避免不同类型的晶体管之间的差异性对像素驱动电路造成的影响。
在一些实施方式中，控制信号RD由外部时序器提供。
需要说明的是，在一些实施方式中，存储电容C1包括相对设置的第一极板21和第二极板22，第一极板21与第一节点a电性连接，第二极板22为扫描线，扫描线用于输入上一级扫描信号。将扫描线作为存储电容C1的第二极板22，不需要增加额外的扫描线，还可以增加该像素驱动电路的开口率，进而增加了开口的发光区域。
请参阅图3，图3为本申请提供的像素驱动电路的驱动信号的时序图。该像素驱动电路的驱动时序包括：初始化阶段t1、阈值电压检测阶段t2以及阈值电压补偿阶段t3。
在初始化阶段t1，本级扫描信号为低电位，控制信号RD为低电位，上一级扫描信号为高电位，第二晶体管T2导通，电源信号ELVDD通过第一晶体管T1传输至发光器件D，此时第二晶体管T2的电压为Vref。
在所述阈值电压检测阶段t2，本级扫描信号为低电位，控制信号RD为高电位，上一级扫描信号为高电位，第二晶体管T2导通，第三晶体管T3导通，电源信号ELVDD通过第二晶体管T2传输至发光器件D，检测模块103检测到第一晶体管T1的漏极输出的实际电流Ir，并计算实际电流Ir与预设电流I之间的差值，以计算出所述第二晶体管T2的补偿电压V。
在所述阈值电压补偿阶段t3，本级扫描信号为高电位，控制信号RD为高电位，上一级扫描信号为低电位，第一晶体管T1导通，第二晶体管T2导通，数据信号Data通过第一晶体管T1传输至第二晶体管T2的栅极，补偿模块101根据补偿电压V对数据信号Data进行补偿，电源信号ELVDD通过第一晶体管T1传输至所述发光器件D。
在一些实施方式中，补偿模块101根据流经第二晶体管T2的实际电流Ir生成第二晶体管的补偿电压V，再根据第二晶体管T2的阈值电压V生成补偿信号，并将补偿信号传输至第一晶体管T1。
具体的，补偿模块101计算流经第二晶体管T2的实际电流Ir与预设电流I之间的差值。例如，预设电流I为2毫安，实际电流为1.5毫安，即实际电流Ir与预设电流I之间的差值为0.5毫安。随后，检测模块103在控制信号RD的驱动下，向第二晶体管T2施加0.5毫安的补偿电流Ib，以使得实际电流Ir稳定在2毫安。然后，补偿模块101根据补偿电流Ib生成第二晶体管T2的补偿电压V。紧接着，再根据第二晶体管T2的补偿电压V生成补偿信号，并将补偿信号传输至第一晶体管T1，以完成对该像素驱动电路的补偿。
相应的，请参阅图4，图4为本申请提供的像素驱动电路的补偿方法的流程示意图。本申请还提供一种像素驱动电路的补偿方法，包括：
110、检测像素驱动电路的第二晶体管的实际电流。
120、计算实际电流与预设电流之间的差值，并根据差值生成补偿信号。
130、基于补偿信号，对像素驱动电路进行补偿。
具体的，首先检测像素驱动电路的第二晶体管T2的实际电流Ir。然后，计算流经第二晶体管T2的实际电流Ir与预设电流I之间的差值，并根据实际电流Ir与预设电流I之间的差值向第二晶体管T2提供补偿电流Is，以使实际电流Ir的电流值与预设电流I的电流值一致。紧接着，再根据补偿电流Is生成第二晶体管T2的补偿电压V，并根据该补偿电压V生成补偿信号。最后，基于补偿信号对该像素驱动电路进行补偿。具体的像素驱动电路的结构请参阅前面实施例，在此不再赘述。
本申请提供的像素驱动电路以及像素驱动电路的补偿方法，采用3T1C结构像素驱动电路，通过检测每一像素中的驱动晶体管的实际电流，并根据该实际电流确定每一像素中的驱动晶体管的阈值电压，进而对每一像素中的驱动晶体管进行有效补偿，以到达提高发光器件的发光均匀性的目的，进而提升画质。
以上仅为本申请的实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (17)

  1. 一种像素驱动电路，其包括：补偿模块、发光模块以及检测模块；所述补偿模块以及所述检测模块均与所述发光模块连接，所述补偿模块与所述检测模块连接；
    所述补偿模块接入本级扫描信号以及数据信号，所述补偿模块用于在所述本级扫描信号的控制下将所述数据信号传输至所述发光模块；
    所述检测模块接入控制信号，所述检测模块用于检测所述发光模块的实际电流，并将所述实际电流与预设电流比较，以生成所述发光模块的补偿电压；
    所述补偿模块还用于在所述本级扫描信号的控制下，根据所述补偿电压对所述数据信号进行补偿。
    其中，所述补偿模块包括存储电容以及第一晶体管；
    所述存储电容的第一端电性连接于第一节点，所述存储电容的第二端电性连接于上一级扫描信号；
    所述第一晶体管的栅极电性连接于所述本级扫描信号，所述第一晶体管的源极电性连接于所述数据信号，所述第一晶体管的漏极电性连接于所述第一节点；
    所述存储电容包括相对设置的第一极板和第二极板，所述第一极板与所述第一节点电性连接，所述第二极板为扫描线，所述扫描线用于输入所述上一级扫描信号。
  2. 根据权利要求1所述的像素驱动电路，其中，所述发光模块包括第二晶体管以及发光器件；
    所述第二晶体管的栅极电性连接于所述第一节点，所述第二晶体管的源极电性连接于电源信号，所述第二晶体管的漏极电性连接于第二节点；
    所述发光器件的阴极端电性连接于所述第二节点，所述发光器件的阳极端电性连接于接地端。
  3. 根据权利要求2所述的像素驱动电路，其中，所述检测模块包括第三晶体管；
    所述第三晶体管的栅极电性连接于所述控制信号，所述第三晶体管的源极电性连接于电流检测模块，所述电流检测模块用于检测所述发光模块的实际电流，并将所述实际电流与预设电流比较，以生成所述发光模块的补偿电压，所述第三晶体管的漏极电性连接于第二节点。
  4. 根据权利要求3所述的像素驱动电路，其中，所述补偿模块根据流经所述第二晶体管的实际电流生成所述第二晶体管的补偿电压，再根据所述第二晶体管的补偿电压生成补偿信号，并将所述补偿信号传输至所述第一晶体管。
  5. 根据权利要求4所述的像素驱动电路，其中，所述像素驱动电路的驱动时序包括：
    初始化阶段，在所述初始化阶段，所述本级扫描信号为低电位，所述控制信号为低电位，所述上一级扫描信号为高电位，所述第二晶体管导通，所述电源信号通过所述第一晶体管传输至所述发光器件；
    阈值电压检测阶段，在所述阈值电压检测阶段，所述本级扫描信号为低电位，所述控制信号为高电位，所述上一级扫描信号为高电位，所述第二晶体管导通，所述第三晶体管导通，所述第一电源信号通过所述第二晶体管传输至所述发光器件，所述检测模块检测到所述第一晶体管的漏极输出的实际电流，并计算所述实际电流与预设电流之间的差值，以计算出所述第二晶体管的补偿电压；
    阈值电压补偿阶段，在所述阈值电压补偿阶段，所述本级扫描信号为高电位，所述控制信号为高电位，所述上一级扫描信号为低电位，所述第一晶体管导通，所述第二晶体管导通，所述数据信号通过所述第一晶体管传输至所述第二晶体管的栅极，所述补偿模块根据所述补偿电压对所述数据信号进行补偿，所述电源信号通过所述第一晶体管传输至所述发光器件。
  6. 根据权利要求4所述的像素驱动电路，其中，所述第一晶体管、所述第二晶体管以及所述第三晶体管均为N型晶体管。
  7. 根据权利要求1所述的像素驱动电路，其中，所述控制信号由外部时序器提供。
  8. 一种像素驱动电路，其包括：补偿模块、发光模块以及检测模块；所述补偿模块以及所述检测模块均与所述发光模块连接，所述补偿模块与所述检测模块连接；
    所述补偿模块接入本级扫描信号以及数据信号，所述补偿模块用于在所述本级扫描信号的控制下将所述数据信号传输至所述发光模块；
    所述检测模块接入控制信号，所述检测模块用于检测所述发光模块的实际电流，并将所述实际电流与预设电流比较，以生成所述发光模块的补偿电压；
    所述补偿模块还用于在所述本级扫描信号的控制下，根据所述补偿电压对所述数据信号进行补偿。
  9. 根据权利要求8所述的像素驱动电路，其中，所述补偿模块包括存储电容以及第一晶体管；
    所述存储电容的第一端电性连接于第一节点，所述存储电容的第二端电性连接于上一级扫描信号；
    所述第一晶体管的栅极电性连接于所述本级扫描信号，所述第一晶体管的源极电性连接于所述数据信号，所述第一晶体管的漏极电性连接于所述第一节点。
  10. 根据权利要求9所述的像素驱动电路，其中，所述存储电容包括相对设置的第一极板和第二极板，所述第一极板与所述第一节点电性连接，所述第二极板为扫描线，所述扫描线用于输入所述上一级扫描信号。
  11. 根据权利要求10所述的像素驱动电路，其中，所述发光模块包括第二晶体管以及发光器件；
    所述第二晶体管的栅极电性连接于所述第一节点，所述第二晶体管的源极电性连接于电源信号，所述第二晶体管的漏极电性连接于第二节点；
    所述发光器件的阴极端电性连接于所述第二节点，所述发光器件的阳极端电性连接于接地端。
  12. 根据权利要求11所述的像素驱动电路，其中，所述检测模块包括第三晶体管；
    所述第三晶体管的栅极电性连接于所述控制信号，所述第三晶体管的源极电性连接于电流检测模块，所述电流检测模块用于检测所述发光模块的实际电流，并将所述实际电流与预设电流比较，以生成所述发光模块的补偿电压，所述第三晶体管的漏极电性连接于第二节点。
  13. 根据权利要求12所述的像素驱动电路，其中，所述补偿模块根据流经所述第二晶体管的实际电流生成所述第二晶体管的补偿电压，再根据所述第二晶体管的补偿电压生成补偿信号，并将所述补偿信号传输至所述第一晶体管。
  14. 根据权利要求13所述的像素驱动电路，其中，所述像素驱动电路的驱动时序包括：
    初始化阶段，在所述初始化阶段，所述本级扫描信号为低电位，所述控制信号为低电位，所述上一级扫描信号为高电位，所述第二晶体管导通，所述电源信号通过所述第一晶体管传输至所述发光器件；
    阈值电压检测阶段，在所述阈值电压检测阶段，所述本级扫描信号为低电位，所述控制信号为高电位，所述上一级扫描信号为高电位，所述第二晶体管导通，所述第三晶体管导通，所述第一电源信号通过所述第二晶体管传输至所述发光器件，所述检测模块检测到所述第一晶体管的漏极输出的实际电流，并计算所述实际电流与预设电流之间的差值，以计算出所述第二晶体管的补偿电压；
    阈值电压补偿阶段，在所述阈值电压补偿阶段，所述本级扫描信号为高电位，所述控制信号为高电位，所述上一级扫描信号为低电位，所述第一晶体管导通，所述第二晶体管导通，所述数据信号通过所述第一晶体管传输至所述第二晶体管的栅极，所述补偿模块根据所述补偿电压对所述数据信号进行补偿，所述电源信号通过所述第一晶体管传输至所述发光器件。
  15. 根据权利要求13所述的像素驱动电路，其中，所述第一晶体管、所述第二晶体管以及所述第三晶体管均为N型晶体管。
  16. 根据权利要求8所述的像素驱动电路，其中，所述控制信号由外部时序器提供。
  17. 一种像素驱动电路的补偿方法，其包括：
    检测所述像素驱动电路的第二晶体管的实际电流；
    计算所述实际电流与预设电流之间的差值，并根据所述差值生成补偿信号；
    基于所述补偿信号，对所述像素驱动电路进行补偿。
PCT/CN2019/082983 2019-04-02 2019-04-17 像素驱动电路以及像素驱动电路的补偿方法 Ceased WO2020199250A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910260987.3A CN109935205B (zh) 2019-04-02 2019-04-02 像素驱动电路以及像素驱动电路的补偿方法
CN201910260987.3 2019-04-02

Publications (1)

Publication Number Publication Date
WO2020199250A1 true WO2020199250A1 (zh) 2020-10-08

Family

ID=66989095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/082983 Ceased WO2020199250A1 (zh) 2019-04-02 2019-04-17 像素驱动电路以及像素驱动电路的补偿方法

Country Status (2)

Country Link
CN (1) CN109935205B (zh)
WO (1) WO2020199250A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110517641B (zh) * 2019-08-30 2021-05-14 京东方科技集团股份有限公司 像素电路、参数检测方法、显示面板和显示装置
CN110689837B (zh) * 2019-10-29 2023-11-28 深圳市华星光电半导体显示技术有限公司 像素驱动电路以及显示面板
CN111540301B (zh) * 2020-01-15 2024-11-12 重庆康佳光电科技有限公司 一种像素补偿电路、显示基板及显示装置
US11244604B2 (en) 2020-01-15 2022-02-08 Chongqing Konka Photoelectric Technology Research Institute Co., Ltd. Pixel compensation circuit, display substrate, and display device
CN111445852A (zh) * 2020-05-06 2020-07-24 Oppo广东移动通信有限公司 像素补偿电路、显示装置及补偿方法
CN114067722A (zh) * 2020-08-06 2022-02-18 深圳市柔宇科技股份有限公司 像素驱动电路、显示面板及像素驱动方法
CN112863444B (zh) * 2021-01-13 2022-05-03 深圳市华星光电半导体显示技术有限公司 驱动电路的补偿电压计算方法
CN116312368A (zh) * 2023-04-07 2023-06-23 北京奕斯伟计算技术股份有限公司 像素电路的补偿方法及补偿装置、显示装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6847172B2 (en) * 2001-11-28 2005-01-25 International Business Machines Corporation Pixel driving circuit system and method for electroluminescent display
US20080284679A1 (en) * 2005-05-11 2008-11-20 Pioneer Corporation Active matrix type display device
CN101582237A (zh) * 2008-05-16 2009-11-18 群康科技(深圳)有限公司 像素结构与有机发光二极管显示器
CN103854602A (zh) * 2012-12-03 2014-06-11 三星显示有限公司 误差补偿器和使用该误差补偿器的有机发光显示设备
CN104658476A (zh) * 2013-11-25 2015-05-27 乐金显示有限公司 有机发光显示装置及其显示面板
CN105047137A (zh) * 2015-09-09 2015-11-11 深圳市华星光电技术有限公司 Amoled实时补偿系统
KR20160094130A (ko) * 2015-01-30 2016-08-09 엘지디스플레이 주식회사 유기 발광 다이오드 소자의 열화 센싱 장치 및 방법
CN106328061A (zh) * 2016-10-14 2017-01-11 深圳市华星光电技术有限公司 Oled像素混合补偿电路及混合补偿方法
CN108877651A (zh) * 2017-05-12 2018-11-23 京东方科技集团股份有限公司 显示面板、显示设备及补偿方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040201557A1 (en) * 2003-04-08 2004-10-14 Shin-Tai Lo Method and apparatus for achieving active matrix OLED display devices with uniform luminance
US7193588B2 (en) * 2003-09-29 2007-03-20 Wintek Corporation Active matrix organic electroluminescence display driving circuit
KR101688923B1 (ko) * 2013-11-14 2016-12-23 엘지디스플레이 주식회사 유기발광표시장치 및 그 구동방법
CN105336293A (zh) * 2014-08-06 2016-02-17 上海和辉光电有限公司 Oled像素电路
CN104658485B (zh) * 2015-03-24 2017-03-29 京东方科技集团股份有限公司 Oled驱动补偿电路及其驱动方法
CN104751799B (zh) * 2015-04-10 2016-12-14 京东方科技集团股份有限公司 像素电路及其驱动方法、显示装置
CN105895022A (zh) * 2016-04-13 2016-08-24 信利（惠州）智能显示有限公司 一种amoled像素驱动电路及像素驱动方法
CN105913801B (zh) * 2016-06-20 2018-08-07 上海天马有机发光显示技术有限公司 一种有机发光显示面板及其驱动方法
CN106504707B (zh) * 2016-10-14 2018-06-01 深圳市华星光电技术有限公司 Oled像素混合补偿电路及混合补偿方法
CN106910466A (zh) * 2017-04-28 2017-06-30 深圳市华星光电技术有限公司 像素驱动电路、显示面板及像素驱动方法
CN108417169B (zh) * 2018-03-27 2021-11-26 京东方科技集团股份有限公司 像素电路的检测方法、显示面板的驱动方法和显示面板
CN109346012A (zh) * 2018-12-05 2019-02-15 深圳市华星光电半导体显示技术有限公司 像素驱动电路及显示装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6847172B2 (en) * 2001-11-28 2005-01-25 International Business Machines Corporation Pixel driving circuit system and method for electroluminescent display
US20080284679A1 (en) * 2005-05-11 2008-11-20 Pioneer Corporation Active matrix type display device
CN101582237A (zh) * 2008-05-16 2009-11-18 群康科技(深圳)有限公司 像素结构与有机发光二极管显示器
CN103854602A (zh) * 2012-12-03 2014-06-11 三星显示有限公司 误差补偿器和使用该误差补偿器的有机发光显示设备
CN104658476A (zh) * 2013-11-25 2015-05-27 乐金显示有限公司 有机发光显示装置及其显示面板
KR20160094130A (ko) * 2015-01-30 2016-08-09 엘지디스플레이 주식회사 유기 발광 다이오드 소자의 열화 센싱 장치 및 방법
CN105047137A (zh) * 2015-09-09 2015-11-11 深圳市华星光电技术有限公司 Amoled实时补偿系统
CN106328061A (zh) * 2016-10-14 2017-01-11 深圳市华星光电技术有限公司 Oled像素混合补偿电路及混合补偿方法
CN108877651A (zh) * 2017-05-12 2018-11-23 京东方科技集团股份有限公司 显示面板、显示设备及补偿方法

Also Published As

Publication number Publication date
CN109935205A (zh) 2019-06-25
CN109935205B (zh) 2020-12-08

Similar Documents

Publication Publication Date Title
WO2020199250A1 (zh) 像素驱动电路以及像素驱动电路的补偿方法
US10769998B2 (en) Pixel circuit and driving method thereof, array substrate, and display panel
US10593260B1 (en) Pixel driving circuit for OLED display device and OLED display device
US10354592B2 (en) AMOLED pixel driver circuit
CN103218970B (zh) Amoled像素单元及其驱动方法、显示装置
US11302254B2 (en) Pixel circuit compensation method and device, and display device
CN103258501B (zh) 一种像素电路及其驱动方法
CN106991968B (zh) 像素补偿电路及补偿方法、显示装置
WO2019071724A1 (zh) Amoled显示装置及其驱动方法
WO2020015317A1 (zh) 有机发光二极管显示模块的补偿系统及补偿方法
WO2021142871A1 (zh) 像素补偿电路及显示面板
WO2023236289A1 (zh) 像素电路及显示面板
WO2020215647A1 (zh) 像素驱动电路以及显示面板
US10140922B2 (en) Pixel driving circuit and driving method thereof and display device
WO2021196279A1 (zh) 像素驱动电路及显示面板
TWM573056U (zh) Pixel circuit and display device
WO2020238014A1 (zh) 像素驱动电路以及显示面板
WO2015172411A1 (zh) 面板驱动电路及面板驱动方法
WO2023115665A1 (zh) 发光器件驱动电路及显示面板
US11037510B2 (en) Pixel driving system for AMOLED display device and driving method
TWM570515U (zh) Pixel circuit and display device
CN115312005A (zh) 显示面板和显示装置
US10223967B1 (en) OLED pixel driving circuit and pixel driving method
WO2020199296A1 (zh) 像素驱动电路以及显示面板
CN104680968B (zh) 像素电路及其显示装置和一种像素电路驱动方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19922440

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19922440

Country of ref document: EP

Kind code of ref document: A1